/**
 * Created by guoao on 2017/4/15.
 */
var myname = "zhai liang";
var alias = "xixi";
var num = 12;
// 强类型  string number boolean any
// 参数指定默认值
function test(a, b, c) {
    console.log(a);
    console.log(b);
    console.log(c);
}
test("xxx", "yyy", "zzz");
